//
//  OAuthViewController.swift
//  Sina
//
//  Created by 王杰 on 15/11/11.
//  Copyright © 2015年 王杰. All rights reserved.
//

import UIKit
import SVProgressHUD
import AFNetworking
class OAuthViewController: UIViewController {
    
    
    //定义一个webView属性
    let webView = UIWebView()
    
    
    //MARK: 监听方法
    @objc private func close() {
        dismissViewControllerAnimated(true, completion: nil)
        SVProgressHUD.dismiss()
        
    }
    
    @objc private func fullAccount() {
        let jsString = "document.getElementById('userId').value = '15711296951' , document.getElementById('passwd').value = 'wudienan!!!';"
        webView.stringByEvaluatingJavaScriptFromString(jsString)
    }
    
    
    override func loadView() {
        view = webView
        webView.delegate = self
    }
    
    override func viewDidLoad() {
        super.viewDidLoad()
        setupUI()
        
        //加载网页
        loadOauthPage()
    }
    
    override func viewDidDisappear(animated: Bool) {
        super.viewDidDisappear(animated)
        SVProgressHUD.dismiss()
    }
    
    
    
    private func loadOauthPage() {
        
        let urlString = "https://api.weibo.com/oauth2/authorize?" + "client_id=" + client_id + "&redirect_uri=" + redirect_uri
        let url = NSURL(string: urlString)
        let request = NSURLRequest(URL: url!)
        webView.loadRequest(request)
    }
    
    private func setupUI() {
        self.navigationItem.leftBarButtonItem = UIBarButtonItem(title: "关闭", style: .Plain, target: self, action: "close")
        self.navigationItem.rightBarButtonItem = UIBarButtonItem(title: "自动填充", style: .Plain, target: self, action: "fullAccount")
    }
    
}

//专门处理 webView所有的协议方法
extension OAuthViewController: UIWebViewDelegate {
    
    func webViewDidStartLoad(webView: UIWebView) {
        SVProgressHUD.show()
    }
    
    func webViewDidFinishLoad(webView: UIWebView) {
        SVProgressHUD.dismiss()
    }
    
    //协议方法 如果返回 bool  一般表示 如果为true  表示当前对象可以正常 工作  否则就不能
    func webView(webView: UIWebView, shouldStartLoadWithRequest request: NSURLRequest, navigationType: UIWebViewNavigationType) -> Bool {
        
        guard let urlString = request.URL?.absoluteString else {
            return false
        }
        
        //是网页请求页面 或者请求授权页面
        if urlString.hasPrefix("https://api.weibo.com") {
            
            return true
        }
        
        if !urlString.hasPrefix(redirect_uri) {
            return false
        }
        
        //程序走到这里  一定包含了  回调的url
        guard let query = request.URL?.query else {
            return false
        }
        
        let codeStr = "code="
        let code = query.substringFromIndex(codeStr.endIndex)
        print(query)
        print(code)
        UserAccountViewModel().loadAccessToken(code) { (error) -> () in
            if error != nil {
                
                SVProgressHUD.showErrorWithStatus("网络君正在思考,拼命加载中.....")
                
                return
                
            }
            //            self.dismissViewControllerAnimated(true, completion: nil)
            
            //moadl出来的页面  需要立即切换页面并且dismiss  需要在dismiss完成后的闭包中 开始页面的切换
            self.dismissViewControllerAnimated(false, completion: { () -> Void in
                NSNotificationCenter.defaultCenter().postNotificationName(AppSwitchRootViewControler, object: "Welcome")
            })
        }
        
        return false
        
    }
    
}

